You could use the dot product by setting up a system of two equations in three unknowns. That is, your unknown vector is r=(x,y,z). Set the dot product of r with both your initial vectors equal to zero, and solve the resulting system.

You could use the dot product by setting up a system of two equations in three unknowns. That is, your unknown vector is r=(x,y,z). Set the dot product of r with both your initial vectors equal to zero, and solve the resulting system.

yeah, I tried that, thats how I've done it before, didn't work out. perhaps its time for a math break.